drm/panfrost: Add AArch64 page table format support

Bifrost GPUs use the standard format stage 1 LPAE page tables matching
the io-pgtable ARM_64_LPAE_S1 format. The one difference is the TCR or
TRANSCFG register as the Mali driver calls it has its own custom layout.

Signed-off-by: Rob Herring <robh@kernel.org>